Upgrade to smarter scrolling, better comfort, and more productivity with the Signature M550. The versatile mouse features an adaptive scroll SmartWheel that delivers line-by-line precision, and auto-switches to super fast free spin mode with the flick of a finger. A choice of sizes for smaller and larger hands means there's a perfect fit for anyone. Seamless wireless connectivity and a comfort shape keep you comfortable and productive hour after hour. Logitech’s SilentTouch technology delivers silent clicks to keep you focused – while 24-month battery life** and universal operating system compatibility ensure hassle-free performance. **Battery life may vary based on user and computing conditions.